Megan Tantillo is a Doctor of Nursing Practice (DNP), board-certified Family Nurse Practitioner, and Founder and Clinical Director of Holistic Health Code (hhc+), an integrative and functional medicine practice based in Farmington, Connecticut.

Megan began her nursing career at Yale New Haven Hospital, where she gained experience across a wide range of medical and surgical specialties before advancing into critical care at Hartford Hospital's Level I Trauma Center. Her background in conventional medicine, combined with her own personal health journey, inspired her to explore a more comprehensive and individualized approach to healthcare.

Recognizing the need for a healthcare model that prioritizes prevention, patient education, and understanding the underlying contributors to illness, Megan founded Holistic Health Code in 2018. What began as a virtual health coaching practice has grown into a multidisciplinary integrative and functional medicine clinic serving individuals and families in Connecticut and across multiple states.

Throughout her career, Megan has pursued advanced training and clinical mentorship in functional medicine, hormone health, and complex chronic illness. Her experience includes working alongside Deanna M. Cherrone, MD, IFMCP, with a focus on Lyme disease, mold-related illness, and individualized treatment approaches. She has also completed advanced training through the Institute for Functional Medicine (IFM) and the International Lyme and Associated Diseases Society (ILADS).

During her doctoral studies at the University of Massachusetts Amherst, Megan designed and implemented a telehealth education and group coaching program focused on improving diabetes self-management. This work further reinforced her belief in the importance of patient education, collaborative care, and empowering individuals to take an active role in their health.

As a Family Nurse Practitioner, Megan provides personalized care for individuals and families across the lifespan. Her approach integrates conventional medical evaluation and treatment with functional medicine principles, combining diagnostic testing, medication management, nutrition, and lifestyle interventions to support long-term health.

Her clinical interests include:

• Hormone health, perimenopause, menopause, and fertility

• Lyme disease, tick-borne co-infections, and complex chronic illness

• Autoimmune and inflammatory conditions

• Digestive health and gastrointestinal disorders

• Metabolic health, insulin resistance, and longevity

• Pediatric health, including PANS/PANDAS

As Founder and Clinical Director, Megan is passionate about building a collaborative team of providers who share her commitment to thoughtful, individualized care. Her vision for hhc+ is to create a healthcare experience where patients feel heard, supported, and empowered to achieve meaningful, lasting improvements in their health.

Outside the clinic, Megan enjoys spending time with her family and friends, Pilates, and experimenting with healthy recipes—especially smoothies and oatmeal pancakes.

Education, Credentials & Achievements:

Education

• Doctor of Nursing Practice (DNP) — University of Massachusetts Amherst, 2021

• Bachelor of Science in Nursing (BSN) — University of Massachusetts Amherst, 2015

• Bachelor of Arts in Biology — University of Rhode Island, 2012

Board Certification & Licensure

• Board-Certified Family Nurse Practitioner (FNP-BC) — American Nurses Credentialing Center (ANCC)

• Advanced Practice Nursing Licensure — Connecticut, Massachusetts, New Jersey, New York, Rhode Island, Virginia, Florida, and California

Advanced Clinical Training

• Applying Functional Medicine in Clinical Practice (AFMCP) — Institute for Functional Medicine, March 2026

• Vector-Borne Illness Fundamentals — International Lyme and Associated Diseases Society (ILADS), October 2023

• Specialized Clinical Training in Hormone Replacement Therapy

• Critical Care Nursing — Hartford Hospital, Level I Trauma Center

Professional Affiliations

• Member — Institute for Functional Medicine (IFM)

Awards & Recognition

• 2026: Five-time 10BEST winner, Natural Nutmeg Magazine Readers' Choice Awards — Best Integrative Nurse Practitioner, Holistic Center, Functional Medicine, Holistic Pediatrician, and Holistic Weight Loss Center

• 2025: Four-time 10BEST winner — Best Integrative Nurse Practitioner, Holistic Center, Functional Medicine, and Holistic Pediatrician

• 2024: 10BEST winner — Best Integrative Nurse Practitioner

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Arlene is a Registered Nurse with diverse experiences. She began her tenure in healthcare directly after high school when she worked in the Dietary Department at Bristol Hospital. Arlene earned her Associate Degree in Respiratory Care to expand on her contributions at Bristol Hospital. She worked there for several years before returning to school to obtain her Bachelor of Science in Nursing at the age of 40. Upon returning to Bristol Hospital, she became a Magnet nursing committee member when the hospital was awarded the prestigious designation as a magnet facility in 2015.

Her nursing experience spans over 20 years. With experience in critical care, hospice, and behavioral health, Arlene has many skill sets she brings to hhc+. Arlene was introduced to functional medicine by her daughter, Dr. Meg. When she began seeing positive results, she was eager to learn more.

As a Registered Nurse, Arlene wears many hats at hhc+. What started with clinic renovations turned into administrative assistance with clinic procedures and client communication. Arlene is now the Clinic Manager and Lead Nurse at hhc+. She provides infusions, injections, and lab draws for hhc+ clients while training new nurses in the practice.

In her free time, she enjoys flying in her Cessna airplane with her husband, Patrick, and spending time with her two daughters and grandchildren.

Credentials, Education & Achievements:

• Associate Degree in Respiratory Care, Manchester Community College

• Bachelor of Science in Nursing, Sacred Heart University

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Ronak Patel, ND, is a board certified and licensed Naturopathic Physician. He grew up in Connecticut and went to pharmacy school in Albany, NY where he received a bachelor’s degree in Pharmaceutical Sciences.

As a graduate from the Southwest College of Naturopathic Medicine in Tempe, AZ, Dr. Patel received the prestigious Daphne Blayden Award for his “commitment to naturopathic medicine, academic excellence, compassion, perseverance, a loving sense of humor and a positive, supportive outlook." 

He believes in an integrative approach, using the best of both worlds of pharmaceutical and nutraceutical interventions. His personal areas of interest are men’s and women’s hormones, thyroid conditions, digestive concerns and autoimmune disease. Dr. Patel prides himself in using a root cause and systems based approach to individualize his patient’s care plan. 

In his time away from the office, he enjoys hiking, cooking, traveling and spending quality time with his friends and family.

Credentials, Education & Achievements:

• Bachelors in Pharmaceutical Sciences, Albany College of Pharmacy

• Naturopathic Doctorate, Southwest College of Naturopathic Medicine

• Board Certified by the North American Board of Naturopathic Examiners

• Licensed by the State of Connecticut Naturopathic Medicine Committee

• Member, American Association of Naturopathic Physicians

• Member, Institute of Functional Medicine

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Brenda is a Doctor of Nursing Practice, Certified Nurse Midwife, and board-certified Family Nurse Practitioner. She is a Certified Menopause Practitioner through The Menopause Society and is licensed to practice nurse-midwifery and advanced practice nursing in Connecticut.

Brenda has been in the nursing field for over 40 years and has practiced as an advanced practice provider specializing in women’s health for more than 30 years. She has extensive experience caring for women during pregnancy and has delivered over a thousand babies. She also has specialized expertise in caring for pregnant women with diabetes. In the office setting, she has provided comprehensive gynecologic care to women across the lifespan.

Through her doctoral training, women’s sexual health and the menopausal transition became true areas of passion for her. As she began moving away from hospital-based care, Brenda found increasing constraints within traditional office-based practice. Recognizing the limitations of the current healthcare system, she sought a different approach to women’s health, one she found at Holistic Health Code. The holistic, client-centered model is a natural complement to her midwifery background and allows her to provide truly comprehensive women’s healthcare.

Brenda continues to evolve her clinical practice to support women in receiving the holistic care they deserve. Her clinical areas of interest include reproductive health, perimenopausal and menopausal care, and other hormonal concerns such as thyroid disorders, insulin resistance, and the role of testosterone in women’s health.

In her free time, Brenda enjoys playing tennis, spending time with her five grandchildren, and traveling the world.

Credentials, Education & Achievements:

• Doctor of Nursing Practice, University of South Florida

• Post-Master’s Certificate Family Nurse Practitioner, Connecticut State University

• Masters Nurse Midwife, University of Rhode Island

• Certified Nurse Midwife, American College of Nurse Midwives

• Certified Menopause Provider, Menopause Society

• Board Certified Family Nurse Practitioner, American Nursing Credentialing Center

• Licensed by the State of Connecticut

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Rebecca DaSilva, CNS, CD-N is a Certified Nutrition Specialist and health coach at Holistic Health Code. She earned her Master’s degree in Nutrition and Functional Medicine from the University of Western States in Oregon, where she built a strong foundation in personalized, evidence-based care. Her passion for nutrition was shaped by a deep appreciation for the connection between what we eat and how we feel, as well as a growing awareness of the importance of food quality and soil health as the foundation of true nourishment and overall well-being.

She takes a collaborative and patient-centered approach, working closely with individuals to create realistic, sustainable changes that support long-term health. She believes that meaningful progress comes from meeting patients where they are, empowering them through education, and building achievable habits that fit seamlessly into their daily lives. By emphasizing long-term behavior change and practical support, she helps patients move beyond short-term fixes toward lasting improvements in health and well-being.

Her areas of interest include foundational nutrition, metabolic health, digestive health, stress resilience, and energy optimization.

In her free time, Rebecca enjoys gardening and spending time outdoors.

Credentials, Education & Achievements:

• Master’s degree in Nutrition and Functional Medicine from the University of Western States in Oregon

As a Lead Clinic Nurse and hhc+, Brianna is a compassionate Registered Nurse with a Bachelor of Science in Nursing from Southern Connecticut State University and a proud background as a United States Navy veteran. She has a strong clinical interest in customized IV therapy, women’s health, weight management, and nutrition, and strives to deliver safe, effective, evidence-based care that supports both immediate and long-term wellness.

With a long-standing interest in functional health and a naturally holistic mindset, Brianna is drawn to care environments that honor the whole person—mind, body, and lifestyle. Her own journey of making meaningful health changes has strengthened her belief in integrative, root-cause-focused care and inspires her to help patients cultivate sustainable improvements in their health.

This passion aligns with her work at Holistic Health Code+, where she is dedicated to continually expanding her clinical knowledge in both traditional and integrative practices, staying current with emerging research and therapeutic options to better support her patients in achieving their healthiest, most resilient selves.

She is known for delivering kind, patient-centered care and supporting each individual’s unique wellness journey with expertise, empathy, and dedication.

Credentials, Education & Achievements:

• Bachelor of Science in Nursing from Southern Connecticut State University

• United States Navy veteran

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Dr. Claudia Bustamante is a naturopathic doctor with specialized training in inflammatory bowel disease (IBD), fecal microbiota transplantation (FMT), and functional medicine. She integrates evidence-based naturopathic medicine with functional medicine principles to address both acute concerns and chronic conditions. Her clinical focus includes gastrointestinal disorders, women's health, and cardiometabolic health.

While working in hospital-based nutrition, Dr. Bustamante recognized a significant need for more holistic approaches to chronic disease management. This inspired her to pursue holistic health coaching, followed by a Master of Science in Nutrition (MScN) and naturopathic medical training. Her background provides a comprehensive understanding of the role nutrition plays in overall health and disease. Her mission is to help patients better understand their bodies and empower them to make sustainable lifestyle changes that optimize long-term health.

Dr. Bustamante provides both medical and educational visits in English and Spanish, allowing her to care for a diverse patient population.

Credentials, Education & Achievements:

• One-Year Residency, Capital Integrative Health/Bastyr University, with specialized training in IBD and FMT with Dr. Mark Davis

• Doctor of Naturopathic Medicine, National University of Natural Medicine, National University of Natural Medicine, 2022

• Master of Science in Nutrition, National University of Natural Medicine, National University of Natural Medicine, 2018

• Bachelors in Nutrition and Dietetics, Universidad Peruana de Ciencias Aplicadas, Lima, Perú

• Holistic Health Coach, Institute for Integrative Nutrition, 2016 Advanced Training 

• Institute for Functional Medicine Certified Practitioner (IFMCP)

• Menopause Management & Hormone Boot Camp, Institute of Women’s Health & Integrative Medicine

• Certified Mold-Literate Practitioner, Dr. Jill Crista Certification

• Integrative Pelvic Floor Therapy Certification

• Holistic Health Coach, Institute for Integrative Nutrition

• Licensure; Professional Membership 

• Licensed in: Maryland and California

Professional Memberships:

• Active member of the Menopause Society

• Gastroenterology Association of Naturopathic Physicians

• American Association of Naturopathic Physicians

• Licensed in CT, MD, CA.

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Elizabeth Mitchell is a board-certified Family Nurse Practitioner licensed in multiple states, providing thoughtful, individualized care to both children and adults. She specializes in complex chronic conditions, with particular expertise in women's hormone health, connective tissue disorders, mast cell activation, gastrointestinal motility disorders, and PANS/PANDAS.

Elizabeth has extensive experience helping medically complex patients navigate what can often feel like a fragmented and frustrating healthcare system. Her perspective became even more personal after her own autoimmune diagnosis, which revealed just how often patients fall through the cracks. That experience led her to pursue advanced training in Functional Medicine through the Institute for Functional Medicine, shaping her integrative, root-cause approach to care.

Over time, Elizabeth recognized a pattern: many patients were being told “everything looks normal” while still feeling anything but normal. Her practice was built around changing that narrative. She approaches care with curiosity, persistence, and a willingness to look deeper, because if you’re still searching for answers, the work isn’t done yet.

As an integrative provider, Elizabeth looks at the full picture, including biology, lifestyle, and environment, to create personalized care plans that actually make sense for real life. She has a special interest in supporting patients who have felt dismissed or overlooked, helping them feel heard, understood, and more in control of their health.

Outside of the clinic, you’ll likely find Elizabeth strength training, hiking New Hampshire trails, or planning her next trip with impressive attention to detail—skills that, fortunately, also translate well to solving complex medical puzzles.

She is licensed in NH, ME, VT, MA, CT, RI, GA, FL, NY, and CA.

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